อยากทราบ code ของระบบ pm หรือส่งข้อความระหว่าง user หา user

<? 

	
	$hostname="localhost";
	$user="root";
	$password="1234";
	$dname="support";
	$tblname="pm";
	$connect = mysql_connect($hostname,$user,$password)or die("can't connect DB");	
	$db = mysql_select_db($dname)or die("can't connect DataBaseName");
	mysql_query("SET NAMES UTF8");
	
	$To_id = $_SESSION["ssUserID"];
	$sql = "select * from pm where To_id =$To_id  ";
	$dbquery = mysql_db_query("support",$sql);	
	$isread = "N";
	
	$sql2 = "select * from $tblname where (isread = '$isread')";
	$dbquery2 = mysql_db_query("support",$sql2);
	$num_rows2 = mysql_num_rows($dbquery2);


?>
ข้อความใหม่ [<? echo $num_rows2 ?>]